Adam (1865)'s description
"P. testa elevato.conica, tenuissima, pallido-fulva, laminis numerosis longitudinalibus tenuibus erectis munita, sutura valde impressa, apice subacuto; anfractibus 6, convexis, ultimo tubam protractam, postice paulum constractam, sursum flectam, inde revertam efformante; umbilico aperto; apertura circulari, subverticali, paululum reclinante; peristomate libero, valde expanso, reflexiusculo. Diam. major 2, minor 1 1/4, axis 2 mill."
Vermeulen (1994)'s description
"Spire conical with flat to slightly concave sides. Apex slightly oblique or not. Whorls 5 3/8 - 5 7/8, convex; last whorl rounded. Constriction with an inconspicuous and often somewhat irregular shaped parietalis, a similar longitudinal palatalis, a transverse palatalis, a knob-shaped columellaris abruptly ending towards the basal side of the constriction. Tuba gradually narrowed towards the constriction, rounded below. Radial ribs moderately spaced (4-6 ribs/0.5 mm on the penultimate whorl, 3-4 ribs/0.5 mm half-way on the tuba0. not sinuous (rarely slightly so). Spiral striation fine. Umbilicus open, 0.25-0.30 mm across. Aperture tilted up to 30 degree with regard to the coiling axis, circular. Peristome (somewhat) distant from the spire, double; outer peristome hardly spreading beyond the inner, but gradually narrowed towards, and absent narrow along the right side of the aperture, slightly widened along the upper side; inner peristome slightly protruding from the outer, spreading. Spire: height 1.7-1.9 mm; width 1.2-1.3 mm; index 1.4-1.6. Total width 2.2-2.3 mm. Height and width aperture 0.5-0.6 mm."